Signal Transmission Error (Between Indoor Unit And Remote Controller) - Daikin CTXS07LVJU Service Manual

SiUS121602E
6.7 Signal Transmission Error (Between Indoor Unit and
Remote Controller)
U5
Error Code
Method of Error In case of controlling with 2 remote controllers, check the system using microcomputer if signal
transmission between indoor unit and remote controller (main and sub) is normal.
Detection
Error Decision Normal transmission does not continue for specified period.
Conditions
Supposed
Causes
Troubleshooting
Service Diagnosis
Connection of 2 main remote controllers (when using 2 remote controllers)
Defective indoor unit PCB
Defective remote controller
Transmission error caused by noise
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Using
YES
2 remote controllers?
NO
Do the
service monitors of all
the indoor units
blink?
YES
Replace the remote controller.
Return to normal?
NO
Replace the indoor unit PCB.
Return to normal?
YES
Is SS1 of
both remote controllers
set to MAIN?
NO
Does
operation return
NO
to normal when the
power is turned off
momentarily?
YES
YES
NO
Troubleshooting for FFQ Series
YES
Set one remote controller to
SUB; turn the power supply
off once and then back on.
NO
Replace the indoor unit
PCB (control PCB).
There is possibility of
malfunction caused by noise.
Check the surrounding area
and turn on again.
Normal
There is possibility of
malfunction caused by noise.
Check the surrounding area
and turn on again.
Normal
(R22251)
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